05-06-2011
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
how to decrease priority of a particular process in time of process creation...
and also how to decrease priority of a particular process after process creation..
can any one please help me out... (2 Replies)
Discussion started by: Ramkum
2 Replies
2. Programming
I want to execute an application from my c code.
I am using system call to run it. But sytem call is blocking, because it waiting to die that application. Therefore, my running application is hanging. I don't want to use the fork. Is there any way to do it. Windows is providing CreateProcess... (1 Reply)
Discussion started by: Saurabh78
1 Replies
3. Shell Programming and Scripting
Hello all,
I would be happy if any one could help me with a shell script that would determine all the processes running on a Unix server and post a mail if any of the process is not running or aborted.
Thanks in advance
Regards,
pradeep kulkarni.
:mad: (13 Replies)
Discussion started by: pradeepmacha
13 Replies
4. Programming
Hi,
can somebody please help me regarding this?
How can i print parent's PID from child's and vice versa.
I have tried with getpid() & ngetppid() function but it is not giving me the correct data. The logic i used is:
if (pid == 0)
{
getpid() : Chil'd PID
getppid():... (1 Reply)
Discussion started by: dsudipta
1 Replies
5. Shell Programming and Scripting
Hi Experts, we do have a shell script for Unix Solaris, which will kill all the process manullay, it used to work in my previous env, but now it is throwing this error.. could some one please help me to resolve it
This is how we execute the script (and this is the requirement) ... (2 Replies)
Discussion started by: jonnyvic
2 Replies
6. Shell Programming and Scripting
get email notification from from system when a process from XXXX user takes longer than 15 min run.Let me know the time estimation for the same.
hi ,any one please tell me , how to write a script to get email notification from system when a process from as mentioned above a xxxx user takes... (1 Reply)
Discussion started by: kirankrishna3
1 Replies
7. Shell Programming and Scripting
Hi all,
This is my sample code in /etc/httpd/conf.d/applications.conf file currently we are creating subdomain mannually for every new subdomain. I want to automate this process througs bash script , how its possible.
<VirtualHost *:80>
ServerName google.com
ServerAlias google.com... (5 Replies)
Discussion started by: anishkumarv
5 Replies
8. BSD
Hi Experts,
I am facing one problem here which is one process always stuck in running state which causes the other similar process to sleep state . This causes my system in hanged state.
On doing cat /proc/<pid>wchan showing the "__init_begin" in the output.
Can you please help me here... (0 Replies)
Discussion started by: naveeng
0 Replies
9. Shell Programming and Scripting
I am writing a script to kick off a process to gather logs on multiple nodes in parallel using "&". These processes create individual log files. Which I would like to filter and convert in CSV format after they are complete. I am facing following issues:
1. Monitor all Processes parallelly.... (5 Replies)
Discussion started by: shunya
5 Replies
10. Shell Programming and Scripting
Team,
I have multiple batchjobs running in VM, if I do ps -ef |grep java or tomcat I am getting multiple process list.
How do I get my exact tomcat process running and that is unique? via shell script? (4 Replies)
Discussion started by: Ghanshyam Ratho
4 Replies
FORK(2) System Calls Manual FORK(2)
NAME
fork - create a new process
SYNOPSIS
#include <sys/types.h>
#include <unistd.h>
pid_t fork(void)
DESCRIPTION
Fork causes creation of a new process. The new process (child process) is an exact copy of the calling process except for the following:
The child process has a unique process ID.
The child process has a different parent process ID (i.e., the process ID of the parent process).
The child process has its own copy of the parent's descriptors. These descriptors reference the same underlying objects, so that,
for instance, file pointers in file objects are shared between the child and the parent, so that an lseek(2) on a descriptor in the
child process can affect a subsequent read or write by the parent. This descriptor copying is also used by the shell to establish
standard input and output for newly created processes as well as to set up pipes.
The child starts with no pending signals and an inactive alarm timer.
RETURN VALUE
Upon successful completion, fork returns a value of 0 to the child process and returns the process ID of the child process to the parent
process. Otherwise, a value of -1 is returned to the parent process, no child process is created, and the global variable errno is set to
indicate the error.
ERRORS
Fork will fail and no child process will be created if one or more of the following are true:
[EAGAIN] The system-imposed limit on the total number of processes under execution would be exceeded. This limit is configuration-
dependent. (The kernel variable NR_PROCS in <minix/config.h> (Minix), or <minix/const.h> (Minix-vmd).)
[ENOMEM] There is insufficient (virtual) memory for the new process.
SEE ALSO
execve(2), wait(2).
3rd Berkeley Distribution May 22, 1986 FORK(2)